<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
    <div id="app">
        <ul v-if="list.length">
            <li v-for="item in list">
                {{ item }}
            </li>
        </ul>

        <div v-else>
            购物车空空如也
        </div>
    </div>

    <script>
        let vm = new Vue({
            el: '#app',
            data: {
                list: []
            },
        })
    </script>
</body>
</html>